Does anyone know where I can buy a wii controller charger?

I have Nintendo wii controllers but they keep breaking because they I have a generic charger. I called Nintendo and they said that to fix the problem I should get a nintendo license or nintendo made controller charger. Does anyone know where I can get one?
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I have a Nyko Charge Base IC and it works pretty well. The controllers are magnetically held in place--they don't plug in at all--and they are induction charged. It does take quite a bit of time to charge if you don't keep them charged all the time. With the magnetic system, you can leave them in their silicon jackets during the charge.